Sewing-machine bobbin-winder.



No. 809,911. I PATENTED JAN. 9, 1906. G. M. EAMES & J. S. FINGH. SEWING MACHINE BOBBIN WINDER.

APPLICATION FILED MAY 25. 1906.

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' WITNESSES. i Wad/L. aw W No. 809,911 PATENTED JAN. 9, 1906. G. M. EAMES & J. s. FINOH. SEWING MACHINE BOBBIN WINDER:

APPLICATION FILED MAY 25. 1905.

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gJWLZZ Zi WITNESSES oda/ A TTORNE Y UNITED STATES PATENT OFFICE...

GEORGE M. EAMES AND JOHN S. FINCH, OF BRIDGEPORT, CONNECTICUT,

BRIDGEPORT, CONNECTICUT, A CORPORATION OF CONNECTICUT.

SEWING-MACHINE BOBBIN-WINDER.

Specification of Letters Patent.

Patented Jan. 9, 1906.

Application filed May 25,1905. Serial No. 262,233-

To all 1071,0122 it may concern:

Be it known that we, GEORGE M. EAMES and, JOHN S. FINGH, citizens of the United States,

residing at Bridgeport, in the county of Fairfield and State of Connecticut, have invented a certain new and useful Improvement in Sewing-l Iaehine BobbinWVinders, of which the followingis a full, clear, and exact description.

The object of this invention is to make a bobbin-winder which may be automatically stopped whenever a predetermined quantity of thread has been wound and to insure uniformity in filling the bobbins with thread, so that each successive bobbin wound will contain very nearly, if not quite, the same quantity of thread.

A further object of the invention is to provide a latch or tripping mechanism by means of which the device is held in operative engagement with and disconnected from the driving agent of such character as to insure nicety of operation, great durability, and lasting etficiency.

In some prior bobbin-winders the tripping device has included a pawl or finger engaging a notch; but the constant wear of the contacting surfaces of both pawl and notch, or tooth, is such that both become so rounded as to render their action very uncertain, causing a great variation in the quantity of thread wound upon successive bobbins and finally becoming wholly inefiicient. These defects are entirely overcome by the present invention, which consists, essentially, of a rotary spindle, on which the bobbin is placed, and a pivoted support for said spindle connected with a fixed portion by means of a breakdown latch or tripping mechanism, which may be actuated by hand or automatically to arrest the rotation of the spindle instantly, so as to avoid overfilling the bobbin.

The invention also consists in certain details of construction and means of adjustment whereby the relation of the tripping-finger with the bobbin may be easily and accurately adjusted.

In the accompanying drawings, illustrating the invention, in the several figures of which like parts are similarly designated, Figure 1 is a perspective view showing the parts in winding position. Fig. 2 is a side elevation Fig. 3 is an end elevation showing the parts in stopped position and the spindle-bearing in section. Fig. 4 is a top plan view with a filled or wound bobbin and in Winding position. Fig. 5 is a side elevation showing a wound bobbin and the parts in winding position in full lines and in stopped position in dotted lines and also showing one form of actuating means.

1 is a base, which may be a casting, provided with a slot 2 to receive screws for fastening it adjustably in place, as upon a bench or table. At one end of this base is an upright lug 3, bored transversely at 4. A standard 5, forked at its lower end to straddle this lug, has ears 6, through which and the bore 7 in the lug a pivot screw or .bolt 7 is passed, so as to secure said standard to the lug and permit it to vibrate upon the lug as a fulcrum. The upper end of this standard is formed with a bearing 8, in which is arranged a spindle 9, provided with a shoulder or tapered step 10 to restrain its endwise movement. The in ner edge of the shoulder 10 is housed within a recess 1O in the end of the bearing 8, (see Fig. 3,) so as to guard said shoulder against thread being Wound between the latter and the edge of the bearing, and said shoulder or step is made tapering toward the free end of the spindle, so that in case thread becomes Wound upon the same, as is frequently the case through inattention and carelessness on the part of the operator, such thread may be quite easily removed. One end 11 of this spindle is split to form a spring-chuck to frictional] y hold a bobbin 12 to be wound with thread. The other end of the spindle has fixed to it a band or other pulley 18, by which the spindle may be rotated. The standard has an eccentrically-arranged lateral projection 14 extending from one of its ears 6, which rests upon a plate-spring ,15, fixed at one end to the base, so that said spring normally tends to throw down the standard rearwardly. The standard has a rearward]y-projecting arm 16 rigid therewith and at about right angles projecting bracket 21, on which is mounted a U-shaped spring 22, secured thereto by a tension-screw 23, tapped in the bracket 21. The forward end'24c of this spring extends free and into the path of rotation of the bobbin 12, and preferably so as to underlie the thread on the bobbin, thereby forming a tripping-finger or trigger to actuate the togglejoint formed by the link 17 and lever 18 and release the winder from engagement with the driving agent. By means of the screw 23 the free end of said spring or finger may be adjusted with respect to the bobbin-spindle so as to cause the tripping to take place sooner or later, as the proper filling of the'bobbin may require.

The band-pulley 13 may be driven in any suitable way, as by means of frictional contact with a belt 25 on pulleys 26 26 mounted in a standard 27, erected on the table, and the lower pulley 26 may be driven by a powerbelt 28 or other suitable mechanism, so as to impart motion to the pulleys 26, and thereby rotate the belt 25. On the base and in line with the groove in the band-pulley 13 is a lump'or projection 29, which, as will presently appear, is adapted to be engaged by the bandpulley to stop the rotation of said pulley, and for this reason this lump or projection is herein designated also as a stop.

An empty bobbin having been sprung upon the clutchend 11 of the spindle and the lever 18 having been thrown forward toward the standard 5 by pressure upon the thumb-piece 20, the link 17 will be straightened out, and thereby the standard 5 will be moved up into its upright and most forward position, the

pivot-screw 30, which connects the link 17 and lever 18, passing slightly below the center line of the said link and lever when they are thus straightened out, and thereby, in conjunction with the thumb-piece 20, serving to make a rigid prop between the arm 16 and the lug 19 to hold the standard 5 in the position indicated in full lines, Figs. 1 and 5, As the bobbin fills the thread will bear down upon the projection 24 of the spring, and thus serve to tilt the link and raise its pivot-center 30, and thereby, in connection with the eccentricity of projection 14:, the spring 15 will exert its force to throw the standard back into the position indicated in Figs. 2 and 3 and by the dotted lines in Fig. 5. In thus throwing the standard backward of course the band-pulley 18 is thrown backward and out of contact with the band 25 and into contact with the lump 29, which lump engages the groove in the band-pulley with sufiicient friction, due to the pressure of the plate-spring 15, to insure the instant stoppage of rotation of the bandpulley, and consequently the stoppage of rotation of the bobbin, and hence there are no extra lengths of thread wound upon the bobbin.

By reference to Figs. 2 and 5 it will be observed that the tripping-finger 24 and link 17, to which it is adjustably secured, form, in effect, a bell-crank lever composed of a long and a short arm whose pivot is at 31, (the connection between arm 16 and link 17,) said finger forming the short arm thereof, while the link constitutes the long arm, and it will be further observedrthat the proportions of these respective arms are such that the slightest motion communicated to the tripping-finger by the filling of thread upon the bobbin will be greatly enlarged at the toggle-joint formed by the pivot 30, and hence the latter will be instantly shifted from its locked position at one side of a line intersecting the pivots 19 and 31 to the other side thereof, whereby a sort of toggle-lever, and equally obviously they form a latch for locking the spindle and its operating-pulley in operative position and for positively throwing it out of such position.

What we claim is- 1. A bobbin-winder, comprising a spindle, a driving-pulley thereon, a spindle carrier or standard, a spring tending to throw said standard out of operative position, and a latch to hold the standard in operative position, said latch including a pair of levers whose adjacent ends are pivoted together and whose opposite ends are pivoted respectively to said standard and the base on which the latter is mounted, thereby forming a toggle between said base and standard to hold the latter in operative position, and means actuated by the filling of the bobbin for shifting the knuckle of said toggle out of alinement with its pivotal extremities.

2. A bobbin-winder, comprising a spindle, a driving-pulley thereon, a spindle carrier or standard, a spring tending to throw said spindle-carrier out of operative position, and a latch to hold the spindle-carrier in operative position, said latch including a pair of levers whose adjacent ends are pivoted together and whose opposite ends are pivoted respectively to said spindle-carrier and the base on which the latter is mounted, thereby forming a tog: gle between said base andspindle-carrier to hold the latter in operative position, a stop for limiting the movement of said levers in advancing the parts to operative position, andmeans actuated by the filling of the bobbin for shifting the knuckle of said toggle out of alinement with its pivotal extremities to release the winder from operative position.

3. A bobbin-winder, comprising a spindle, a driving-pulley thereon, a spindle carrier or standard, a spring tending to throw said standard out of operative position, and a latch to hold the spindle-carrier in operative position, said latch including a pair of levers whose adjacent ends are pivoted together and whose opposite ends are pivoted respectively to said spindle-carrier and the base on which the latter is mounted, thereby forming a toggle between said base and spindle-carrier to hold the latter in operative-position, a stop for limiting the movement of said levers in advancing the parts to operative positions, and adjustable means actuated by the filling of the bobbin for shifting the knuckle of said toggle out of alinement with its pivotal extremities, whereby the quantity of thread wound upon the bobbin may be regulated.

4. A bobbin-winder, comprising a spindle, a driving-pulley thereon, a pivoted standard on which the spindle is mounted, aspring tending to throw said standard out of operative position, and a latch to hold the standard in operative position, said latch including a bellcrank lever one arm of which extends in close proximity to the bobbin to be wound and is adapted to be engaged and actuated thereby and the other arm of which is connected to a lever pivoted to the base.

5. In abobbin-winder, comprisingaspindle, a driving-pulley thereon, a pivoted standard on which the spindle is journaled, a spring tending to throw said standard out of operative position, and a latch to hold the standard in operative position, said latch including a bell-crank lever one arm of which extends in close proximity to the bobbin to be wound and is adapted to be engaged and actuated thereby and the other arm of which is connected to a lever pivoted to the base and provided at one end with a thumb-piece which overlaps one arm of said bell-crank and serves as a stop to position said levers for holding the winder in engagement with the driving agent.

6. A bobbin-winder, comprising a spindle, and a driving-pulley thereon, apivoted standard on which the spindle is journaled, aspring tending to throw said standard out of operative position, and a latch to hold the standard in operative position, said latch including a bell-crank lever one arm of which comprises a resilient ad ustable tripping-finger or trigger secured to said lever by an ad usting-screw and extending in close proximity to the bobbin to be wound and adapted to be engaged and actuated thereby, the other arm of said bell-crank connected to a lever pivoted to the base and provided at one end witlra thumbpiece which overlaps one arm of said bellcrank and serves as a stop to position said levers for holding the winder in engagement with the driving agent.

7. A bobbin-winder, comprising a base, a standard pivoted on said base and having an eccentrically-arranged lateral projection at or near its bottom, a spindle mounted on said standard, a driving-pulley on said spindle, a spring secured to the base and adapted to bear upon the lateral projection in such manner as to normally throw the standard out of operative position, and a breakdown latch to hold the standard in operative position.

8. A bobbin-winder, comprising a standard or spindle-carrier suitably mounted upon a base, a spring tending to throw said standard out of operative position, a spindle journaled within said standard and having on one end a driving-pulley, and at the other end provided with a shoulder whose edge adjacent the hearing is housed within a recessin said standard whereby the thread is guarded from winding between said shoulder and bearing.

9. A bobbin-winder, comprising a standard or spindle-carrier suitably mounted upon a base, a spring tending to throw said standard out of operative position, a latch for holding said standard in operative position, a spindle journaled within said standard and having on one end a driving-pulley and its other end provided with a shoulder or step whose edge adjacent the bearing is housed within a recess in said standard and whose periphery is tapered in a direction toward the bobbin position, whereby thread inadvertently wound thereon may be easily removed.

In testimony whereof we have hereunto set our hands this 22d day of May, A. D. 1905.

GEORGE M. EAMES. JOHN S. FINOH.

Witnesses:

E. L. TOLLES, F. W. OSTROM. 

